Re: Question on targets and goals

[Oleksandr Gavenko]

08.08.2011 15:01, Jeffrey Walton пишет:
> On Mon, Aug 8, 2011 at 7:57 AM, Greg Chicares<address@hidden>  wrote:
> > On 2011-08-08 10:51Z, Jeffrey Walton wrote:
> > > I would like to invoke make with a debug or release configuration, but
> > > without a rule:
> > >      `make debug` or `make release`
> > >
> > > Later:
> > >
> > > ifeq ($(MAKECMDGOALS),debug)
> > >    CXXFLAGS += -DDEBUG=1 -g3 -ggdb -O0
> > > endif
> > >
> > > Because I don't have a rule, I'm getting a make error:
> > >      make: *** No rule to make target `debug'.  Stop.
> > >
> > > So I think I've figured out how *not* to do it.
> > >
> > > I need to pick up debug or release, then invoke the `all` rule.  Can
> > > anyone suggest a way that works?
> >
> > Untested:
> >
> > `make build_type=debug all` or `make build_type=release all`
> >
> > ifeq (debug,$(findstring debug,$(build_type)))
> >   CXXFLAGS += -DDEBUG=1 -g3 -ggdb -O0
> > endif
> Thanks Greg. I was trying to stay away from the flags style since its
> less intuitive (we're targeting folks whose primary language might not
> be C/C++).
>
>    `make debug` =>  easy, no user questions
>    `make build_type=debug all` =>  what was that flag again?
How about:

debug: CXXFLAGS += -DDEBUG=1 -g3 -ggdb -O0
debug: all

release: CXXFLAGS += -UDEBUG -O2
release: all

Read "6.11 Pattern-specific Variable Values".

--
С уважением, Александр Гавенко.